Spool holder for winding machines



March 6, 1945. A W S|EGENTHALER 2,370,924

' SPOOL HOLDER FOR WINDING MACHINES Filed Dec'. 3l, 1945 maa u. s, vuns srooi. nomas Foa wrNmNG momes Walter Siegentlnler, Erlenbach, Zurich, Swltserland, assigner to Maschinenfabrik Sehu'er, Erlenbach, Zurich, Switzerland Application December 31, 1943, Serial No. 518,459

In Switserland February 1, 1943 I 5 Claims. (Cl. 242-485) tween the clamping jaws. 'Ihe clamping eiIect thus produced diminishes when the actuation of the holder ceases.

By this means, the spool is safely held by the 'spool holder during the winding operation andat the same time the insertion of the empty spool and the removal of the full spool is facilitated. The last named operations may be effected automatically if, for example, a helical spring is resorted to which is arranged in the spool holder so as to be effective in the axial direction thereof. The spool holder is thus particularly well suited for use in winding machines having a revolving head for supporting a plurality of spools which are fed to the working,

that is, winding position and are removed therefrom again to a position of delivery after having been wound by intermittent advancing, i. e. turning of the revolving head.

An embodiment of the invention is illustrated by way of example only in the accompanying drawing in which Fig. l shows the holder with the spool inserted therein in an axial section;

Fig. 2 shows the holder after the ejection of the spool in an axial section;

Fig. 3 is a sectional front face view of the holder;

Fig. 4 is an axial section and Fig. 5 is a perspective view of a clamping jaw.

The numeral I refers to a socket which is fixed to a hollow spindle 2 through which protrudes the massive winding spindle for common rotation withvsaid hollow spindle when the winding spindle is actuated. In a cylindrical bore of the socket I a sleeve 4 is arranged which is provided with two inner oppositelv disposed ribs 5 one side of which registers with a shoulder 6 on the inner circumference of the inserting sleeve I. The shoulder 8 thus forms a raised portion within the embrace of the two ribs B.

In the sleeve 4 two oblong clamping jaws are of an inserting sleeve,

kloosely inserted which have a rear portion 'I and a 'front portion 8. The rear clamping jaw portion I has a cross section approximately like a half-ring the circumferential length of which decreases continuously towards the free rear end face. A shoulder l forms the boundary between the rear clamping jaw portion 1 and the iront clamping jaw portion l which isA provided with c two oppositely disposed attenings I0 by virtue of which the front portions I ofthe two clamping jaws ilnd room for their accommodation between the two ribs 8 on the sleeve 4, as shown in Fig. 3.

Due to cooperation of the ilattenings I0 on the clamping v:Iaws 1, 8 with the guide ribs on the sleeve l the clamping jaws l, l are so arranged relative to the sleeve l as to be kept from rotation in the circumferential direction. On the other hand the clamping jaws l, 8 are secured axially in theI direction towards the front in that the shoulder 8 provided on the individual clamping jaws l, 8, which shoulders within the range of the iiattenings I0 on the clamping jaws are correspondingly broadened, cooperate with the respective shoulders 6 on the sleeve 4, which shoulders 6 are correspondingly broadened within the range of the guide ribs 5. v

A rear wall I'I arranged on the socket I makes allowance for a limited movement of the clamping jaws 1, 8 so that these can operate in the manner of two-armed levers by their shoulders 9 cooperating with the shoulders 6 `on the sleeve 4 as bearing seatings or as thrust bearing sur- 430 faces for pivoting movement of the jaws relative thereto. The portion 1 of each clamping jaw constitutes a lever arm which is longer andf heavier compared with the shorter portion 8 the.

free end of which presents a catching edge I2. The spindle 3 is provided within the range of the clamping jaws 1, 8 with a thickened portion Il which joins with a reduced, smooth part, that is. a part not carrying a spring and projecting out of the socket I for the reception of the spool I5. 0n the thickened portion Il on the spindle 3 a helical spring It is pushed, the rear portion of which, lying within the embrace of the said thickened portion, is fixed relative to the spindle 3 and which in the non-loaded condition thereof 45 extends far out over the reduced part Il of the spindle 3. v

On the said part il of the spindle 3 the empty spool I5 is pushed as shown in Fig. l so that the helical spring I8 is compressed to a correspond'- 50 ing extent. The spool I5 has been pressed into the spool holder described above to such an extent that the flange I'l on the spool base has come to lie behind the catching edge I2 of the portion l of both clamping jaws, for which purpose the l. two clamping jaw portions I had to be slightly 'Ihe second end of the spool I5 is On actuating the winding spindle 3, the described spool holder arranged thereon is turned in unison with the spindle together with the clamping jaws 1, 8. By action of centrifugal force the two heavier lever arms I of the clamping jaws 1, 8 tend to move apart, whereas the lever arms 8 of lighter weight tend to approach on each other, whereby their clamping eiect is enhanced so that conjoint movement of the spool I and Vof the holder, that is, of the winding spindle 3 is ensured.

lAfter the empty spool I5 has been wound in the required manner the drive of the winding spread apart by means of the spool in inserting the latter.

y, received in a counter holder I8 which is indicated in Fig. 1 only fragmentarily.

winding in the holder having an innerv circumference. a housing surroundingl all of said jaw means arranged in said holder along said inner Acircumference of said holder,l an inner set-back spindle 3 is disconnected and the counter holder I8 is retracted from position of operation. As the spool holder then slows down the clamping jaws l, 8 incline to move into position of restso that their clamping eilect is accordingly reduced and'is then overcome by the action of the helical spring I 6, due to instability of equilibrium, whereupon this spring in being released pushes the completely wound spool I5 from the donning spindle I4 so that the spool is slid off in appropriate 'position towards, that is, into a receiving vessel, as shown in Fig. 2.

Thereupon, a fresh empty spool can be inserted in the immovable holder by the clamping jaws being moved out of position of rest by means of the spool, whereupon the clamping jaws by overcoming their inertia vare accordingly pivotally displaced for clampingly engaging with thespool.

'I'he spool holder described permits of lastingly reliably securing the respective spools as inserted in winding position with the aid of relatively simple means as well as of safely automatically ejecting the spools on the termination of the Winding so ,that manual handling of the full spool is dispensed with and thus care is taken for obviating the risk of soiling the thread winding.

Obviously the spool holder as described above by way of example is adapted to be employed also in connection with machines which ai; all times accommodate only just the spool arranged in winding position and are thus not qualified for receiving a certain amount of stored spools.

'I'he construction of the spool holder may, if desired, be such that the socketI and the inserting sleeve as described with reference to the present instance are dispensed with. In certain circumstances the thickened portion I3 provided on the donning part I4 may serve as a bearing seating for the clamping jaws provided that the bearing seating or thrust bearing surface is transposed from the outer side of the clamping jaws to the inner side thereof. Obviously more than two movable clamping jaws may be provided or only lone clamping jaw may be movably arranged in a manner to serve for enhancing or diminishing the clamping eiect for the purposes described.

Alternatively, the wound spool can be doffed from the spool holder in other manner than described in connection with this instance, for example, automatically by means of a driving device in order to obviate touching the thread winding by hand. If desired, also the arrangement of means for automatically ejecting the spool may be dispensed with.

I claim: 1 1 'Y 1. In a drivable spool holder for winding ma on said housing, means for loosely mounting one.

of said'jaws in said housing for movement relative to fthe remaining jaw means for allowing the insertion of said spool into locking' engagement with all of saidgjaw means, a shoulder on said loosely mounted jaw means for cooperation with said set-back for adapting the lastnamed jaw means to function as a two-armed lever by pivoting aboutsaid set-back byy action of centrifugal force set up in the holder for venhancing said spool locking engagement during the winding operation and diminishing said locking engagement as the driving speed of said holder slows down, and stop means on saidhousing for preventing said two-armed lever from rotating circumferentially of said holder relative to said housing. /r/

2. In adrivable spool holder for winding machines, clamping jaw means for conjointly clampingly holding the spool arranged ine-position of winding in the holder having an inner circumference, a housing surrounding all of said jaw -means arranged in said holder along said inner circumference of saidholder, an inner set-back in-the inner circumference of the holder, means for loosely mounting one of said jaw means in said housing forv movement relative to the remaining jaw means for allowing the insertion of vsaid spool into locking engagementl with all of said jaw means, flattenings provided on said loosely mounted jaw means, a, shoulder on said loosely mounted jaw means for cooperation with 'said set-back for adapting the lastnamed jaw 4U means to function as a two-armed lever by pivot-l ing about said set-back by action of centrifugal force set up in the holder for enhancing said spool locking engagement during the Winding operation and diminishing said locking engagement as the driving speed-of said holder slows down, and stop means arranged on said housing within the embrace of said set-back for cooperation with said iiattenings for preventing said two-armed lever from rotating circumferentially of said Iholder relative to said housing.

3. Ina drivable spool holder for winding machines, clamping jaw means for conjointly clampingly holding the spool arranged in positionv of winding in the holder having an inner circumference, a housing surrounding all of said jaw means arranged in said holder along said inner circumference of said holder, a seating on said housing, means for loosely mounting some of said jaw means in said housing for movement relative'fto 50 the remaining jaw means for allowing the insertion of said spool into locking engagement .with

all of said jaw means, a shoulder on each of said loosely mounted jaw means for cooperation withl said seating for adapting the lastnamedvv jawv means to function as two-armed leversibybpivoting about said seating, by action v.oft centrifugal force set up in the'holder for enhancing said spool locking engagement during-fthe Winding operation and diminishing said'lockingengagement as the driving speed of said-*holder slows down, and stop means on said .'hosing.for preventing said two-armed levers from trotating circumferentially of said holder` relative -to said housing.

4. In a drivable spool holder forwinding machines, clamping jaw means for conjointly clamp ingly holding the spool arranged in positionl of winding in the holder having an inner circumference, a housing surrounding all of said Jaw means arranged in said holder along said inner circumference of said holder, a seating onsaid housing, means for loosely mounting some of said jaw means in said housing for movement relative to the remaining ljaw means for allowing the insertion of said spool into locking engagement with all of said jaw means, flattenings provided on said loosely mounted jaw means, a shoulder on each of said loosely mounted jaw means for cooperation with said seating for adapting the last named jaw means to function as two-armed levers by pivoting about said seating by action of centrifugal force set up in the holder for enhancing said spool locking engagement during the winding operation and diminishing said locking engagement as the driving speed of said holder slows down, and stop means arranged on said housing within the embrace of said seating for cooperation with said fiattenings for preventing said two-armed lever from rotating circumferentially of said holder relative to said housing.

5. In a drivable spool holder for winding machines, clamping jaw means for conlointly clampingly holding the spool arranged in position of winding in the holder having an inner circumference, a housing surrounding all of said jaw means arranged in said holder along said inner circumference of said holder, means for loosely mounting one of said jaw means in said housing for movement relative to the remaining jaw means for allowing the insertion of said spool into locking engagement with all of said jaw means, a

spindle extending 4coaxially with said windingA position and projecting beyond said housing, a helical spring surrounding said spindle for being compressed as said spool is inserted into said locking engagement, and means cooperating with said loosely mounted jaw means by action of centrifugal force set up in the holder for enhancing said spool locking engagement during the winding operation and diminishing said locking engagement as the driving speed of said holder slows down, whereupon said spool is automatically removedfrom said spindle by pressure action of said spring.

'WALTER SEGEN'I'HALER. 

